lp-83 Rev. 006 Rel. 005 Date 12.18.17
18
1. Fill the water heater by opening the cold water shut-off valve.
Purge air from the system by opening a hot water outlet at a fixture
in a kitchen or bathroom. When water flows freely from the outlet, the
system is purged.
Part 5 - Start-Up and Operation
When filling the water heater, open a hot water tap to release air in
the tank and piping to ensure proper water heater operation. Failure
to ensure the water heater is full before turning on the system will
result in damage to the water heater, and could result in property
damage. Such damages ARE NOT covered by warranty.
2. Check the system for leaks.
Fix any leaks before continuing the installation. Failure to do so
could result in property damage or personal injury.
Risk of scald injury increases as you increase water temperature.
Figure 30 - Sealing the Water Heater for Sanitary Applications
Item #
Part #
Description
1
TP1500
T&P Relief Valve
(SSU-20 - SSU-60
and All DW Models)
(Not Included with Water Heater)
TP1400
T&P Relief Valve
(SSU-80, SSU-119,
and All C Models)
(Included with Water Heater)
Table 8 - Replacement Parts List
3. After ensuring there are no leaks within the system, flush the system
to clear any soldering residue. Many soldering fluxes contain Zinc
Chloride, which can corrode stainless steel.
Draw at least three times the volume of the water heater to properly
flush the system.
4. Initiate a call for hot water. Ensure each zone valve or circulator
operates only when its thermostat calls for heat. Purge each zone of
air to ensure proper operation.
5. Set the water
heater to the desired
temperature. Boiler
high limit should
be set at least 20
o
F
higher than the heater
temperature. Set the
low limit of the boiler
control at the minimum
setting - this will call
the burner on only to
satisfy the tank control.
A water heater
temperature setting of
120
o
F is recommended.
However, a lower
temperature setting
may be required to
comply with local
and state codes for
normal operation. The
differential should
be set at 10 to 15
o
F.
Installation conditions
may require a higher or lower temperature setting. A mixing valve in
conjunction with a high temperature setting may be used for high
demand applications (spas, hot tubs, whirlpools).
6. When the system is completely flushed, purged of air, and the
temperature is set, turn on the boiler. Observe operation. Ensure the
boiler shuts down after the indirect water heater set point is satisfied.
Figure 31 - Replacement Parts